Civilized Morality to Savage Morality

 I will let C.S Lewis answer this question of morality 

If no set of moral ideas were truer or better than any other, there would be no sense in preferring civilized morality to savage morality, or Christian morality to Nazi morality. In fact, of course, we all do believe that some moralities are better than others.

We do believe that some of the people who tried to change the moral ideas of their own age were what we would call Reformers of Pioneers — people who understood morality better than their neighbors did. Very well then.

The moment you say that one set of moral ideas can be better than another, you are, in fact, measuring them both by a standard, saying that one of them conforms to that standard more nearly than the other. But the standard that measures two things is something different from either. You are, in fact, comparing them both with some Real Morality, admitting that there is such a thing as a real Right, independent of what people think, and that some people’s ideas get nearer to that real Right than others.

Or put it this way. If your moral ideas can be truer, and those of the Nazis less true, there must be something — some Real Morality — for them to be true about. The reason why your idea of New York can be truer or less true than mine is that New York is a real place, existing quite apart from what either of us thinks. If when each of us said ‘New York’ each means merely ‘The town I am imagining in my own head’, how could one of us have truer ideas than the other? There would be no question of truth or falsehood at all.

In the same way, if the Rule of Decent Behaviour meant simply ‘whatever each nation happens to approve’, there would be no sense in saying that any one nation had even been more correct in its approval than any other; no sense in saying that the world would ever grow morally better or morally worse.

I conclude then, that though the difference between people’s ideas of Decent Behaviour often make you suspect that there is no real natural Law of Behaviour at all, yet the things we are bound to think about these differences really prove just the opposite.